Gift Ideas for a little Gardener?

My little boy loves gardening (especially getting messy and finding all sort of bugs) and its coming up to his birthday (he's 6), I was thinking of getting him some these bookends with these lovely snails. Does anyone have any other suggestions or ideas for a good present.

When Possum was small a friend gave her a toy insect examining thing. Catch insect, put it in container and then view it down a mini microscope. That would be easy to use for him and more inter active.

You could also consider a set of child size tools - trowel, hand fork, watering can.